(人教版)必修二unit3computers學案

高一英語學案 時間： 2019年 12 月13 日 班級_ 姓名_學案裝訂線課題：Unit3 Computers教師寄語：Learn as if you were going to live forever. Live as if you were going to die tomorrow.Learning aims: 1. To learn how to use the new words and expressions.2. To develop the students ability of reading.3. To motivate the students interest in science and technology.學習過程. Pre-reading by talking about how computer works How does a computer work?A computer has four main parts: the arithmetic and logic unit (ALU), the control unit, the memory, and the input and output devices (collectively termed I/O). These parts are interconnected by groups of wires. The control unit, ALU, registers, and basic I/O (and often other hardware closely linked with these) are collectively known as a central processing unit (CPU). Early CPUs were comprised of many separate components but since the mid-1970s CPUs have typically been constructed on a single integrated circuit called a microprocessor. Preview the new words.1. 計算vt. _ 7. analytical _2. 普遍的/宇宙的 adj. _ 8.intelligence _3. 工藝；科技;技術(shù)n. _ 9. solve _4. 革命 n. _ 10.application _5.真實；事實; 現(xiàn)實 n. _ 11.finance _6.可移動的 adj. _ 12.explore_. During-readingStep I Fast reading-Read the passage quickly and silently, and then answer the following questions.1. Who is the speaker in this story?2. What was the computer called in 1936?3. What happened to the computer in the 1970s?4. Look at these inventions. Can you put them in an order according to the time when they appeared? ( ) analytical machine ( ) laptop ( ) calculating machine ( ) robot ( ) PC ( ) universal machine Step II Careful reading-Read the passage again and answer the following questions.Task 1 Read the passage for the second time and find the topic sentences of each paragraph.Par. 1_Par. 2_Par. 3_What is the main idea of the passage?_Task 2. Read the passage for the third time and finish the timeline below. 16421822The analytical machine was made by Charles Babbage.19361940s_The first family of computers was connected to each other.1970sNow. Please finish the following exercise.1.TranslationAt that time it was considered a technological revolution and the start of my “artificial intelligence”._2. Which sentence in the passage can be replaced by the following one? With time going by, I grew smaller in size._Step III SummaryStep IV Debate How computers have changed our lives? What are the disadvantages and disadvantage of computers? (Discuss with your group members.)Step V Homework請你根據(jù)以下要點以 My view on computers 為題寫一篇英文短文。要點：1. 電腦已走進普通人的家庭； 2. 電腦的優(yōu)勢： 方便查找信息；可以玩游戲、聊天、聽音樂等；發(fā)送電子郵件和朋友保持聯(lián)系等 電腦的劣勢： 長間使用電腦危害身體健康；有些人癡迷于網(wǎng)絡(luò)游戲，浪費了許多寶貴的時間 3.你的觀點：注意：1.可根據(jù)內(nèi)容需要適當增加細節(jié) 2.詞數(shù)：120150參考詞匯：對 上癮 be addicted to 方便 convenience _課堂設(shè)計流程課題：Computers 第一步：導入本節(jié)課題“Computers”.第二步：展示學習目標（